Developing triple (13C, 15N, 34S) stable isotope analysis as a tool in aquatic food web studies: seagrass meadows as model system (TRIAS)

本研究的目标是建立三重(13C，15N，34S)稳定同位素分析方法，作为分析水生食物网的工具。三重同位素分析对于以海底-远洋耦合为特征的木质网具有特殊的潜力，因为它在沿海和浅海是典型的。我们将使用基尔附近的海草草甸和上面的水柱作为模型系统。之所以选择这一模式系统，是因为海草草甸是最具生产力的海洋生态系统之一，是鱼类和其他动物的重要育苗场，是全球濒危的，就基本碳源和海底-中上层耦合的多样性而言，是一个复杂的系统。在两个生长季节，将对食物网的所有重要组成部分进行采样，以进行随后的稳定同位素分析和脂肪酸分析，作为营养关系的指标。

It is the goal of this study, to establish triple (13C, 15N, 34S) stable isotope analysis as a tool for the analysis of aquatic food webs. The triple isotope analysis has a particular potential for wood webs which are characterized by bentho-pelagic coupling, as it is typical for coastal and shallow seas. We will use a seagrass meadow in the vicinity of Kiel and the overlying water column as a model system. This model system is chosen because seagrass meadows- are among the most productive marine ecosystems- are important nursery grounds for fish and other fauna- are globally endangered- are complex systems in terms of the diversity of number of basal carbon sources and of bentho-pelagic coupling.During 2 growth seasons, all important components of the food web will be sampled for subsequent stable isotope analysis and analysis of fatty acids as indicators of trophic relationships.